Question

___many times,he finally understood it.A.Told B.Telling C.Having told n told 选A还是选D呢？为什么？

___many times,he finally understood it.A.Told B.Telling C.Having told D.Having been told 选A还是选D呢？为什么？

Answer 1

D 这句话想表达的意思是已经告诉他许多次了。他与告知是被动关系，故选D

Answer 2

A吧 tell 及物动词，不是加宾语就是被动形式，told 是 tell 的过去形式，表被动，表达被告知。

Answer 3

D他是被告诉的，而且主句是过去式。